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Record Information
Version3.6
Creation Date2012-09-06 15:16:51 UTC
Update Date2016-02-11 01:31:38 UTC
HMDB IDHMDB15146
Secondary Accession NumbersNone
Metabolite Identification
Common NameMetyrapone
DescriptionMetyrapone is only found in individuals that have used or taken this drug. It is an inhibitor of the enzyme steroid 11-beta-monooxygenase. It is used as a test of the feedback hypothalamic-pituitary mechanism in the diagnosis of cushing syndrome. [PubChem]The pharmacological effect of Metopirone is to reduce cortisol and corticosterone production by inhibiting the 11-ß-hydroxylation reaction in the adrenal cortex. Removal of the strong inhibitory feedback mechanism exerted by cortisol results in an increase in adrenocorticotropic hormone (ACTH) production by the pituitary. With continued blockade of the enzymatic steps leading to production of cortisol and corticosterone, there is a marked increase in adrenocortical secretion of their immediate precursors, 11-desoxycortisol and desoxycorticosterone, which are weak suppressors of ACTH release, and a corresponding elevation of these steroids in the plasma and of their metabolites in the urine. These metabolites are readily determined by measuring urinary 17-hydroxycorticosteroids (17-OHCS) or 17-ketogenic steroids (17-KGS). Because of these actions, metopirone is used as a diagnostic test, with urinary 17-OHCS measured as an index of pituitary ACTH responsiveness. Metopirone may also suppress biosynthesis of aldosterone, resulting in a mild natriuresis.
Structure
Thumb
Synonyms
ValueSource
MetiraponaChEBI
MetopironChEBI
MetopironeChEBI
MetyraponumChEBI
MepyraponeHMDB
MethapyraponeHMDB
MethbipyranoneHMDB
MethopiraponeHMDB
MethopyraponeHMDB
MethopyrinineHMDB
MethopyroneHMDB
MetroprioneHMDB
MetyraponHMDB
Chemical FormulaC14H14N2O
Average Molecular Weight226.2738
Monoisotopic Molecular Weight226.11061308
IUPAC Name2-methyl-1,2-bis(pyridin-3-yl)propan-1-one
Traditional Namemetyrapone
CAS Registry Number54-36-4
SMILES
CC(C)(C(=O)C1=CN=CC=C1)C1=CN=CC=C1
InChI Identifier
InChI=1S/C14H14N2O/c1-14(2,12-6-4-8-16-10-12)13(17)11-5-3-7-15-9-11/h3-10H,1-2H3
InChI KeyInChIKey=FJLBFSROUSIWMA-UHFFFAOYSA-N
Chemical Taxonomy
DescriptionThis compound belongs to the class of organic compounds known as aryl alkyl ketones. These are ketones have the generic structure RC(=O)R', where R = aryl group and R'=alkyl group.
KingdomOrganic compounds
Super ClassOrganooxygen compounds
ClassCarbonyl compounds
Sub ClassKetones
Direct ParentAryl alkyl ketones
Alternative Parents
Substituents
  • Aryl alkyl ketone
  • Pyridine
  • Heteroaromatic compound
  • Azacycle
  • Organoheterocyclic compound
  • Hydrocarbon derivative
  • Organonitrogen compound
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors
Ontology
StatusExpected but not Quantified
Origin
  • Drug
Biofunction
  • Antimetabolites
  • Enzyme Inhibitors
Application
  • Pharmaceutical
Cellular locations
  • Cytoplasm
  • Membrane
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point50.5 °CNot Available
Boiling PointNot AvailableNot Available
Water Solubility4.27e-01 g/LNot Available
LogP1.8Not Available
Predicted Properties
PropertyValueSource
Water Solubility0.43 mg/mLALOGPS
logP2.09ALOGPS
logP2.03ChemAxon
logS-2.7ALOGPS
pKa (Strongest Basic)4.87ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area42.85 Å2ChemAxon
Rotatable Bond Count3ChemAxon
Refractivity65.94 m3·mol-1ChemAxon
Polarizability23.98 Å3ChemAxon
Number of Rings2ChemAxon
Bioavailability1ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Spectra
Spectra
Spectrum TypeDescriptionSplash Key
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, PositiveNot Available
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, PositiveNot Available
Biological Properties
Cellular Locations
  • Cytoplasm
  • Membrane
Biofluid Locations
  • Blood
  • Urine
Tissue LocationNot Available
PathwaysNot Available
Normal Concentrations
BiofluidStatusValueAgeSexConditionReferenceDetails
BloodExpected but not QuantifiedNot ApplicableNot AvailableNot AvailableTaking drug identified by DrugBank entry DB01011
  • Not Applicable
details
UrineExpected but not QuantifiedNot ApplicableNot AvailableNot AvailableTaking drug identified by DrugBank entry DB01011
  • Not Applicable
details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB01011
DrugBank Metabolite IDNot Available
Phenol Explorer Compound IDNot Available
Phenol Explorer Metabolite IDNot Available
FoodDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID4030
KEGG Compound IDC07205
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkMetyrapone
NuGOwiki LinkHMDB15146
Metagene LinkHMDB15146
METLIN IDNot Available
PubChem Compound4174
PDB IDMYT
ChEBI ID44241
References
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available

Enzymes

General function:
Involved in monooxygenase activity
Specific function:
Has steroid 11-beta-hydroxylase activity. In addition to this activity, the 18 or 19-hydroxylation of steroids and the aromatization of androstendione to estrone have also been ascribed to cytochrome P450 XIB.
Gene Name:
CYP11B1
Uniprot ID:
P15538
Molecular weight:
57572.44
References
  1. Young EA, Ribeiro SC, Ye W: Sex differences in ACTH pulsatility following metyrapone blockade in patients with major depression. Psychoneuroendocrinology. 2007 Jun;32(5):503-7. Epub 2007 Apr 25. [17462829 ]
  2. Johansson MK, Sanderson JT, Lund BO: Effects of 3-MeSO2-DDE and some CYP inhibitors on glucocorticoid steroidogenesis in the H295R human adrenocortical carcinoma cell line. Toxicol In Vitro. 2002 Apr;16(2):113-21. [11869873 ]
  3. Hermansson V, Asp V, Bergman A, Bergstrom U, Brandt I: Comparative CYP-dependent binding of the adrenocortical toxicants 3-methylsulfonyl-DDE and o,p'-DDD in Y-1 adrenal cells. Arch Toxicol. 2007 Nov;81(11):793-801. Epub 2007 May 9. [17487473 ]
  4. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [11752352 ]
  5. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4-hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Acts as a 1,8-cineole 2-exo-monooxygenase. The enzyme also hydroxylates etoposide.
Gene Name:
CYP3A4
Uniprot ID:
P08684
Molecular weight:
57255.585
References
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in monooxygenase activity
Specific function:
Metabolizes several precarcinogens, drugs, and solvents to reactive metabolites. Inactivates a number of drugs and xenobiotics and also bioactivates many xenobiotic substrates to their hepatotoxic or carcinogenic forms.
Gene Name:
CYP2E1
Uniprot ID:
P05181
Molecular weight:
56848.42
References
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in monooxygenase activity
Specific function:
Exhibits a high coumarin 7-hydroxylase activity. Can act in the hydroxylation of the anti-cancer drugs cyclophosphamide and ifosphamide. Competent in the metabolic activation of aflatoxin B1. Constitutes the major nicotine C-oxidase. Acts as a 1,4-cineole 2-exo-monooxygenase. Possesses low phenacetin O-deethylation activity.
Gene Name:
CYP2A6
Uniprot ID:
P11509
Molecular weight:
56517.005
References
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. Epub 2009 Nov 24. [19934256 ]
General function:
Involved in monooxygenase activity
Specific function:
Preferentially catalyzes the conversion of 11-deoxycorticosterone to aldosterone via corticosterone and 18-hydroxycorticosterone.
Gene Name:
CYP11B2
Uniprot ID:
P19099
Molecular weight:
57559.62
References
  1. Roumen L, Sanders MP, Pieterse K, Hilbers PA, Plate R, Custers E, de Gooyer M, Smits JF, Beugels I, Emmen J, Ottenheijm HC, Leysen D, Hermans JJ: Construction of 3D models of the CYP11B family as a tool to predict ligand binding characteristics. J Comput Aided Mol Des. 2007 Aug;21(8):455-71. Epub 2007 Jul 24. [17646925 ]
  2. Gomez-Sanchez CE, Zhou MY, Cozza EN, Morita H, Foecking MF, Gomez-Sanchez EP: Aldosterone biosynthesis in the rat brain. Endocrinology. 1997 Aug;138(8):3369-73. [9231789 ]

Transporters

General function:
Involved in ATP binding
Specific function:
May act as an inducible transporter in the biliary and intestinal excretion of organic anions. Acts as an alternative route for the export of bile acids and glucuronides from cholestatic hepatocytes
Gene Name:
ABCC3
Uniprot ID:
O15438
Molecular weight:
169341.1
References
  1. Teng S, Jekerle V, Piquette-Miller M: Induction of ABCC3 (MRP3) by pregnane X receptor activators. Drug Metab Dispos. 2003 Nov;31(11):1296-9. [14570758 ]